Lysine and arginine requirements of Salminus brasiliensis

Pesquisa Agropecuária Brasileira

Jony Koji Dairiki²  Ricardo Borghesi¹  Carlos Tadeu Dos Santos Dias¹  José Eurico Possebon Cyrino¹ 

[1] ,Embrapa Amazônia OcidentalManaus AM ,Brazil

关键词: amino acid;    dose-response;    dourado;    regression;    aminoácido;    dose-reposta;    dourado;    regressão;   

DOI  :  10.1590/S0100-204X2013000800029

来源: SciELO

【 摘 要 】

The objective of this work was to determine the dietary lysine (DL) and dietary arginine (DA) requirements of dourado (Salminus brasiliensis), through dose-response trials using the amino acid profiles of whole carcasses as a reference. Two experiments were carried out in a completely randomized design (n=4). In the first experiment, groups of 12 feed-conditioned dourado juveniles (11.4±0.2 g) were stocked in 60 L cages placed in 300 L plastic indoor tanks in a closed circulation system. Fish were fed for 60 days on diets containing 1.0, 1.5, 2.0, 2.5, 3.0, or 3.5 % dietary lysine. In the second experiment, dourado juveniles (27.0±0.8 g) were fed for 60 days on semipurified diets containing arginine at 1.0, 1.5, 2.0, 2.5 or 3.0%, in similar conditions to those of the first experiment. Optimal DL requirements, as determined by broken-line analysis method for final weight, weight gain and specific growth rate, were 2.15% DL or 5% lysine in dietary protein, and 1.48% DA or 3.43% arginine in dietary protein. The best feed conversion ratio is attained with 2.5% DL or 5.8% lysine in dietary protein and 1.4% DA or 3.25% arginine in dietary protein.

【 授权许可】

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